Ce‐Doped SnO 2 Nanoparticles for Low‐Temperature Catalytic Pyrolysis of Polypropylene Toward Circular Economy

Catalytic pyrolysis of polypropylene (PP) has been performed at low temperature using doped SnO 2 nanoparticles (NPs) as a sustainable approach. Ce doping into SnO 2 lattice causes a charge imbalance and distortion resulting in oxygen vacancies and defects yielding significant amounts of hydrogen and methane gases in contrast with pure SnO 2 . Carbonaceous material was detected on the catalyst surface and subjected to comprehensive analysis using various analytical methods. The reaction parameters (temperature, heating rate, and plastic‐to‐catalyst ratio) were systematically varied to maximize fuel generation, and the conditions yielding the highest output were identified. A maximum yield of hydrogen gas ∼26.91 mmol per gram PP has been generated at optimized conditions‐ a temperature of 500 °C with a heating rate of 10 °C per minute and a catalyst:plastic ratio of 2:5. The study illuminates the intriguing properties of doped SnO 2 to carry out hydrocarbon cracking, and sustain plastic pyrolysis at lower temperature into value‐added products. Overall, the study explores a sustainable plastic waste management strategy that focuses on energy efficiency, increased gas production, and improved catalytic efficiency, aligning with the principles of green chemistry and sustainability.